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Node Details

  • Name: End
  • Type: End
  • Version: 2.0
  • Category: Sequential Agents
  • Base Class: End

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Parameters

The End node accepts one input parameter:
LabelNameType
Agent | Condition | LLM | Tool NodesequentialNodeAgent | Condition | LLMNode | ToolNode
This parameter represents the preceding node in the sequence, which can be an Agent, a Condition, an LLM (Language Model), or a Tool node.

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Input/Output

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Input

  • The node requires a predecessor node of type ISeqAgentNode.
  • If no predecessor is provided, an error will be thrown.

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Output

  • The node returns an ISeqAgentNode object with the following properties:
    • id: The unique identifier of the node
    • node: Set to the constant END
    • name: Set to the constant END
    • label: Set to the constant END
    • type: Set to ‘end’
    • output: Set to the constant END
    • predecessorAgents: An array containing the input sequential node

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Usage

The End node is typically placed at the conclusion of a Sequential Agents workflow. It ensures that the process terminates appropriately and doesn’t continue beyond the intended endpoint.

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Implementation Details

  • The node is implemented as a class named End_SeqAgents.
  • It implements the INode interface.
  • The init method is responsible for processing the input and generating the output.
  • The node uses the END constant from the @langchain/langgraph package to signify the termination point.

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Documentation

For more detailed information on using the End node in Sequential Agents workflows, refer to the official documentation:

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Notes

  • The hideOutput property is set to true, indicating that the node’s output should not be displayed in the user interface.
  • This node is essential for properly structuring and terminating Sequential Agent workflows.